When your furnace is running correctly, it should give warmth without generating too much noise. While it’s expected to notice your furnace making noise as it starts up, other sounds are indicating your furnace requires immediate professional support.

Here are some of the most frequent furnace noises and what they could be signaling. If your furnace is making a strange noise, our friendly heating pros are here to help with the best furnace repair in Lawrence, Kansas.

1. Furnace Making a Banging Noise

You could have an urgent issue on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be several problems. These include gas accumulating in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over the years, so that’s why it’s essential to schedule annual furnace maintenance with Scott Temperature. One of the jobs our pros complete during this work is clean your furnace’s burners. When this component gets grubby, you may hear your furnace making a loud rumbling noise after ignition takes more time. The following gas buildup can fracture your furnace’s heat exchanger, where natural gas turns into heat. Any fractures in it can leak carbon monoxide, which is normally emitted away from your home. This toxic gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Scott Temperature recommends turning it off and calling us at 785-269-0465. Too much natural gas in your furnace or a cracked heat exchanger are critical issues that should get immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver hot air throughout your house. If the ductwork wasn’t installed correctly or is getting dated, it can make a lot of noise when your furnace is on. This may be the case if your furnace makes a banging noise when it shuts off. Contact Scott Temperature at 785-269-0465 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound usually indicates an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to operate on the correct voltage. If wires or the box isn’t tight enough, you might hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves heated or cooled air throughout your residence, and a capacitor, which turns on the motor. If either of these pieces are failing, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be the result of something small, like an unsecure screw, or something major, like a broken component. In either case, we urge you to shut your furnace off and calling our heating professionals at 785-269-0465 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s making an effort to alert you it needs some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn out or a bearing could need to be lubed. We are aware that maintenance sometimes slips your mind, but our pros can get your furnace running quietly again quickly.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s likely the result of an air leak in your ductwork. You might also hear whistling while the furnace is running if a floor vent is loose. If you’ve looked at your vents but are still noticing sound, Scott Temperature can help. It’s essential to get loose ductwork taken care of fast, since it can result in comfort troubles in your house and drive up your energy expenses.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal sound frequently means there’s trouble with your furnace’s blower. Turn off your furnace off immediately and call our pros at 785-269-0465 for help.

When you’re getting a weird noise from your furnace, Scott Temperature is here to help. Contact us at 785-269-0465 to book your furnace repair appointment now.